“If we can establish a Mars colony, we can almost certainly colonise the whole Solar System, because we’ll have created a strong economic forcing function for the improvement of space travel.” From Aeon: Elon Musk argues that we must put a million people on Mars if we are to ensure that humanity has a future. There’s something about making huge money in technology that makes people want to live forever and move to Mars. Most of of us will be lucky if we make Moon money.